preaction sprinkler system

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A dry-pipe sprinkler system which is activated by a smoke- or heat-sensing device, thereby opening a control valve and admitting water.

preaction sprinkler system

preaching cross at Inverary, Argyllshire, Scotland

A fire sprinkler system using automatic sprinklers (heads) attached to a piping system; is controlled by a supplemental fire detection system, that is installed in the same area as the sprinklers; actuation of the detection system opens a valve which permits

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